State Route 730 (SR 730) is a 11.45-mile-long (18.43 km) north–south state highway in the southwestern quadrant of the U.S. state of Ohio. The highway travels from its southern terminus at a T-intersection with SR 133 about 2.50 miles (4.02 km) northeast of Blanchester to its northern terminus at a signalized intersection with US 68 and SR 134 in Wilmington.